Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd4064c8713bb10…

MALICIOUS

PDF

116.2 KB Created: 2021-07-02 13:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c577b5979d0e57839fc3a988b9af2e5 SHA-1: 42693b3c2eaf534a2035b0be29e0df1b7ec03bf1 SHA-256: fdd4064c8713bb10b762bd2cf770cab9e9053542074f2a3c03144506a53f2b83
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ClamAV and an ML classifier, with a high-confidence heuristic indicating an advance-fee scam lure. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute fraudulent content or redirect users to phishing sites. The primary attack pattern involves tricking users into believing they are receiving a parcel or winning a lottery, requiring them to pay fees.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://alakharia.com/public_html/userfiles/file/87034437667.pdf
    • http://se-ty.ru/uploads/userfiles/file/pojufotefoxowuvutokazev.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9500396b0---jaworumajenuzidopeles.pdf
    • http://ahxxzx.com/userfiles/202106/file/xesijikobi.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740370ec33d---55811979732.pdf
    • https://mancomunidadvaldizarbe.com/userfiles/files/luzexavuwabosado.pdf
    • http://thuduchouse.vn/pics/file/xolisudaxakirizuf.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/343e2de5d5128f687840de61885ace7e/68906915912.pdf
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/39ddd605c1a9a7cf3d66fdb3720757f6/7393767160.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16073b420b0a43---dibawaxozowuxaf.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/fvp91udcoui4ssd21512cj2tf1/26509425964.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737336d9f22---8343702096.pdf
    • http://orem.mn/uploads/files/43576298253.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/a0cs583a0r1njcn8lkpic51ost/jekob.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b041b35978184cf56f2c6843689a6b92/gejurakun.pdf
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/pipasegutavugositob.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/zopejuxifelamas.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a564af67878c85b48b7e1eeb12ce17c1/37255344811.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/a40b3a47d65b0b84691151ab3622b9c0/32941654504.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/h2gqtma4uobmc40gjm7qqoko72/54436838224.pdf
    • http://ugrctrani.it/userfiles/files/16727937169.pdf
    • https://alexandrapanayotou.com/web/images/static/file/72736753445.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/1d2c91e859c44144a272c59c2000f7d2/50941079730.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/517fd0d2a18b945d73c0775dc738f69e/86731883030.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=living+in+polynesia
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e2b.bin
a25a73bad104a642df11aa41d692ca3b340ecc3d0a0e2b984939458191cf41c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2B 10368 bytes
font_01_sfnt_off000165b0.bin
aa7441df0596243773f8df8ace219df39d723f7166cf3e95e8c9f93e93a40782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165B0 16588 bytes
font_02_sfnt_off00017c42.bin
bb592964093658020bb3843e7a21735a897bbf20f0553aec797b02c6b9b0aea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C42 18060 bytes
font_03_sfnt_off0001ab4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB4A 16792 bytes

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